Alert archive / Arizona / Special Weather Statements in 2018

Special Weather Statement, NWS Phoenix, AZ

October 23, 2018Pinal County, Arizona

NWS Phoenix, AZ issued this special weather statement at Oct 23, 2018, 1:02 PM MST for Pinal County, Arizona. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 23, 2018, 1:02 PM MST (20:02 UTC)
Expired: Oct 23, 2018, 1:30 PM MST
In force: 28 min
Issued by: NWS Phoenix, AZ

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 37 km from the middle of the area, began a volume at 20:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tuscon, AZ (KDMA), launched 12:00Z, 8.0 hours before the alert went out and 106 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 801 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this special weather statement went out at Oct 23, 5:50 AM MST, 7 hours 12 minutes earlier.

Area forecast discussion, Oct 23, 5:50 AM MST, 7 hours 12 minutes before

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In the hours before

Special weather statement, Oct 23, 9:35 AM MST, 3 hours 27 minutes before

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Special weather statement, Oct 23, 11:14 AM MST, 1 hour 48 minutes before

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Special weather statement, Oct 23, 1:02 PM MST, 0 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 23, 2:46 AM MST	Special Weather Statement	PSR	Gila	14 min
Oct 23, 3:41 AM MST	Special Weather Statement	PSR		34 min
Oct 23, 6:28 AM MST	Special Weather Statement	PSR	Gila	47 min
Oct 23, 9:35 AM MST	Special Weather Statement	PSR	Gila	25 min
Oct 23, 11:14 AM MST	Special Weather Statement	PSR		46 min
Oct 23, 1:22 PM MST	Special Weather Statement	PSR	Pinal	38 min
Oct 23, 1:23 PM MST	Special Weather Statement	PSR	Pinal	52 min
Oct 23, 1:27 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	48 min
Oct 23, 1:52 PM MST	Areal Flood Advisory	PSR	Pinal	70 min
Oct 23, 1:56 PM MST	Special Weather Statement	PSR	Gila	49 min
Oct 23, 1:58 PM MST	Special Weather Statement	PSR	Pinal	47 min
Oct 23, 2:01 PM MST	Severe Thunderstorm Warning	PSR	Pinal	27 min
Oct 23, 2:07 PM MST	Special Weather Statement	PSR		38 min
Oct 23, 2:31 PM MST	Special Weather Statement	PSR		44 min
Oct 23, 2:56 PM MST	Special Weather Statement	PSR		49 min
Oct 23, 2:58 PM MST	Special Weather Statement	PSR	Pinal	47 min
Oct 23, 3:06 PM MST	Special Weather Statement	PSR		39 min
Oct 23, 3:26 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Oct 23, 3:31 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	59 min
Oct 23, 3:39 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	51 min
Oct 23, 3:44 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Oct 23, 3:54 PM MST	Special Weather Statement	PSR		51 min
Oct 23, 4:05 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	55 min
Oct 23, 4:07 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Oct 23, 4:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Oct 23, 4:16 PM MST	Special Weather Statement	PSR	Maricopa	44 min
Oct 23, 4:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	25 min
Oct 23, 4:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	37 min
Oct 23, 4:30 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Oct 23, 4:42 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Oct 23, 4:56 PM MST	Special Weather Statement	PSR	Maricopa	49 min

Nearby

Special Weather Statements in Arizona, 2018 Every special weather statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.